典型文献
Deformation kinking and highly localized nanocrystallization in metastable β-Ti alloys using cold forging
文献摘要：
Deformation kinking as an uncommon plastic deformation mechanism has been reported in several ma-terials while the relevant microstructure evolution and grain refinement behavior at a large strain remain unclear so far.In this study,the issue was systematically investigated by utilizing cold forging to im-pose severe plastic deformation(SPD)on Ti-11 V metastable β-Ti alloys.It is found that the formation of kink bands experiences dislocation gliding,pre-kinking and the ripening of pre-kinks in sequences.The kink bands are subsequently thickened through the coalescence of multiple kink bands in a manner of high accommodation.Ordinary dislocation slip is developed as a dominant deformation mechanism when deformation kinking is exhausted.The resulting grain refinement involves transverse breakdown and lon-gitudinal splitting of dislocation walls and cells,which fragment kink bands into small β-blocks.Further refinement of the β-blocks is still governed by dislocation activities,and finally nanograins with a diam-eter of～15 nm are produced at a large strain of 1.2.Alternatively,it is revealed that nanocrystallization is highly localized inside kink bands while the outer microstructure maintains original coarse structures.Such localized refinement characterization is ascribed to the intrinsic soft nature of kink bands,shown as low hardness in nanoindentation testing.The intrinsic softening of kink bands is uncovered to originate from the inner degraded dislocation density evidenced by both experimental measurement and theoreti-cal calculation.These findings enrich fundamental understanding of deformation kinking,and shed some light on exploring the deformation accommodation mechanisms for metal materials at large strains.
文献关键词：
中图分类号：
作者姓名：
Keer Li;W.Chen;G.X.Yu;J.Y.Zhang;S.W.Xin;J.X.Liu;X.X.Wang;J.Sun
作者机构：
State Key Laboratory for Mechanical Behavior of Materials,Xi'an Jiaotong University,Xi'an 710049,China;Northwest Institute for Nonferrous Metal Research,Xi'an 710016,China;Baoji Titanium Industry Co.,Ltd.,Baoji 721014,China
文献出处：
引用格式：
[1]Keer Li;W.Chen;G.X.Yu;J.Y.Zhang;S.W.Xin;J.X.Liu;X.X.Wang;J.Sun-.Deformation kinking and highly localized nanocrystallization in metastable β-Ti alloys using cold forging)[J].材料科学技术（英文版）,2022(25):53-64
A类：
nanocrystallization,kinks,gitudinal
B类：
Deformation,kinking,highly,localized,metastable,Ti,alloys,using,cold,forging,uncommon,plastic,deformation,has,been,reported,several,while,relevant,microstructure,evolution,refinement,behavior,large,remain,unclear,far,In,this,study,issue,was,systematically,investigated,by,utilizing,pose,severe,SPD,It,found,that,bands,experiences,dislocation,gliding,pre,ripening,sequences,are,subsequently,thickened,through,coalescence,multiple,manner,accommodation,Ordinary,slip,developed,dominant,when,exhausted,resulting,involves,transverse,breakdown,lon,splitting,walls,cells,which,fragment,into,small,blocks,Further,still,governed,activities,finally,nanograins,diam,eter,produced,Alternatively,revealed,inside,outer,maintains,original,coarse,structures,Such,characterization,ascribed,intrinsic,nature,shown,low,hardness,nanoindentation,testing,softening,uncovered,originate,from,inner,degraded,density,evidenced,both,experimental,measurement,theoreti,calculation,These,findings,enrich,fundamental,understanding,shed,some,light,exploring,mechanisms,metal,materials,strains
AB值：
0.54167
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